package com.site.blog.my.core;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Hujf
 * @title: QRCodeGenerator
 * @date 2020/11/8 0008下午 1:16
 * @description: TODO
 */
public class QRCodeGenerator {
    private static final String QR_CODE_IMAGE_PATH = "static-files/MyQRCode.png";

    private static void generateQRCodeImage(String text, int width, int height, String filePath) throws WriterException, IOException {
        Map<EncodeHintType, String> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        MultiFormatWriter qrCodeWriter = new MultiFormatWriter();

        BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height,hints);

        Path path = FileSystems.getDefault().getPath(filePath);

        MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);

    }

    public static void main(String[] args) {
        try {
            String s =new File(".").getAbsolutePath();
            generateQRCodeImage("http://hujf.xyz", 350, 350, QR_CODE_IMAGE_PATH);
        } catch (WriterException e) {
            System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("Could not generate QR Code, IOException :: " + e.getMessage());
        }
    }
}
